I though I understood the fee system but I was so wrong. Take a look at this transaction
http://blockchain.info/tx/f7e67a8236e1cfd38e5679f1cbd08e4d0f337a20947b4c001bdbadfe2fb1abb3. The fee paid was just
BTC0.0002 which is less than the
BTC0.0005 fee described on the
https://en.bitcoin.it/wiki/Transaction_fees#Sending page. As I understood it, since one of the output was less than
BTC0.01, the fee should have been
BTC0.0005. So why wasn't this the case?
And a follow up question: if the fee is still obligatory and can be set lower like in this case, could the fee have been just 1 satoshi?